Red Beard Sponge
Clathria prolifera · Also known as: Microciona prolifera, red sponge
Bright orange-red encrusting sponge of Mid-Atlantic pilings, shells, and jetties, often mistaken for coral or algae.
Quick facts
| Group | Sponge |
|---|---|
| Likelihood nearby | ★★★☆☆ |
| Habitats | Inlet, Coastal bays, Offshore / ocean, Ocean beach |
| Seasons (this coast) | year-round |
How to recognize them
- Orange to brick-red patches or finger-like lobes on wood, rock, and shell.
- Soft, porous texture when wet; can dry darker and crumbly in wrack.
Biology notes
- Filter-feeding sponge colony that pumps water through tiny pores.
- Common fouling organism on docks and hard bay structure.
Where to see them around Ocean City
- West Ocean City docks, Inlet pilings, and bulkheads at low tide.
- Pieces in beach wrack after storms.
When to look
- Year-round; easiest on exposed structure at spring lows.
Viewing tips & etiquette
- Pretty to photograph; don’t scrape live sponges off pilings.
